Journal of the Elisha Mitchell Scientific Society, Volumes 40-41Elisha Mitchell Scientific Society, 1924 - Natural history Vol. 20- include the Proceedings of the North Carolina Academy of Science, 1902- |
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Common terms and phrases
abdomen Achlya acid adnate apex apical Asheville atom basal base Basidia Basidia 4-spored bees BERT CUNNINGHAM body broad brown campanulate cells Cephalothorax chelicera cilia clypeus Coker coll College color Committee corn coxæ cultures curved cystidia dark darker diameter distal dorsal eggs electrons Elisha Mitchell Euglena eye-tubercle female femur fertilizers front Fungi genus Gills glabrous hairs high school hive hyphae lateral legs length light loess male margin median membrane mesonotum method motion Mycena North Carolina nucleus observer oogonia oogonium orbits pale palpus particles patella Ph.D pine pipette plant PLATES posterior produced protein pubescence punctures Raleigh reddish Saprolegnia seed segment shale shining side slender slides slightly smooth species specimens spines sporangia sporangium spores Stem striate surface tarsus theory thick thin Thraustotheca threads tibia tooth train tubercles velocity white pubescence yellow yellowish
Popular passages
Page 2 - Brownian motion is a microscope, which need not even be a particularly good one. Brown was working with grains of pollen of certain plants, that is: particles or granules of unusually large size varying from one four-thousandth to about five-thousandth of an inch in length. He reports further: While examining the form of these particles immersed in water, I observed many of them evidently in motion. . . . These motions were such as to satisfy me, after frequently repeated observation, that they arose...
Page 77 - If we accept the hypothesis that the elementary substances are composed of atoms we cannot avoid concluding that electricity also, positive as well as negative, is divided into definite elementary portions, which behave like atoms of electricity.
Page 77 - The electrical matter consists of particles extremely subtle since it can permeate common matter, even the densest, with such freedom and ease as not to receive any appreciable resistance".
Page 4 - The very unexpected fact of seeming vitality retained by these minute particles so long after the death of the plant would not perhaps have materially lessened my confidence in the supposed peculiarity. But I at the same time observed, that on bruising the ovula or seeds of Equisetum, which at first happened accidentally, I so greatly increased the number of moving particles, that the source of the added quantity could not be doubted. I found also that on bruising first the floral leaves of Mosses,...
Page 86 - XX (1906), 199. through space, as Thomson had assumed it to do, but that a given source could emit and absorb radiant energy only in units which are all exactly equal to hv, v being the natural frequency of the emitter and ha constant which is the same for all emitters. I shall not attempt to present the basis for such an assumption, for, as a matter of fact, it had almost none at the time. But whatever its basis, it enabled Einstein to predict at once that the energy...
Page 4 - June, inclusive. 9. AMENDMENTS — This Constitution may be amended by a two-thirds vote of those present at any regular meeting of the Society provided the amendment shall have been approved by the Council by letter ballot by a two-thirds vote of the members voting.
Page 5 - That extremely minute particles of solid matter, whether obtained from organic or inorganic substances, when suspended in pure water, or in some other aqueous fluids, exhibit motions for which I am unable to account, and which from their irregularity and seeming independence resemble in a remarkable degree the less rapid motions of some of the simplest animalcules of infusions.
Page 5 - Molecules, appear to be spherical or nearly so, and to be between l-20,000dth and l-30,000dth of an inch in diameter ; and that other particles of considerably greater and various size, and either of similar or of very different figure, also present analogous motions in like circumstances.
Page 139 - absolute, true and mathematical time flows in virtue of its own nature, uniformly and without reference to any external object;" and that "absolute space, by virtue of its own nature and without reference to any external object, always remains the same and is immovable.
Page 107 - The beginning of winter varies also by several weeks: after the first of December, mild weather is often changed into a cold, that within two or three days fills the rivers of the northern and middle states with ice; by which vessels outward bound are detained, and those coming on the coast suffer severely.